No one knows when or why the split occured between our two worlds. The only thing we know is that it did happen. Many storys tell of marriages and dealings between our two peoples (sadly some ending in animosity). In today's society our ,once brethren, have been reduced to a silly product of a child's mind and quickly quashed as soon as the subject crops up. Popular film companies have also popularized the silly and frivilous faery icon with wanton disregard for historical accounts of the Sidhe time and time again. These representations can be nothing short of a complete falsification. The faeries of legend were both intensily feared and revered. They controled the very elements in many tales and caused many a careless person to suffer for their transgressions. Throughout the British Isles in the more rural areas, the faery kin is still held in this regard. In Northern Ireland to this day, fern is hung above doors to protect against baneful faeries. The crops left in the field after Samhain (01 Nov) are left for the Phooka, a mischevious faery that is known to give men rides on his back and dump them headlong into a river. In Britian children are still warned of Jenny Greenteeth and Peg Powler, two insideous aquatic faeries that delight in drowning unwary children. But there are just as many kind faeries as bad in the world of the Fey.
Good Faeries crop up in many popular childrens tales such as the Brownie of the German peoples. The Brownie is also known by many other names in other cultures and is a beneficial house faery. There is also the Tuatha de Danaan (TooTha Day DahNon: peoples of the goddess Dana) a large trooping faery peoples that are known to be seen in large processions around the pagan high holidays. They are also known to have rode tiny horses, bred to their small stature. These faeries were very kind with the ancient peoples of Ireland and bestowed many great gifts apon them.
So with that little bit of commentary. I want to show you some lovely folklore and ritual practices involving the Sidhe ( Shee: People of the Hills).
The Wiccan & Faerie Grimoire of Francesca De Grandis